words = open('/usr/share/dict/ukrainian').read().splitlines() # contains over a millon words. Requires package wukrainian to be installed

from collections import Counter
allwords = ''.join(words).lower()
counts = Counter(allwords)
freq = [100.0 * counts[c]/len(allwords) for c in itos[1:]]

import matplotlib.pyplot as plt
%matplotlib inline
f, ax = plt.subplots(figsize=(16,8))
plt.bar(range(nchars-1), freq, width=0.4)
ax.set_xticks(range(nchars-1))
ax.set_xticklabels(itos[1:])
ax.set_yticks(range(10))
ax.set_yticklabels(['%d%%' % i for i in range(10)])
ax.grid(axis='y');
f.savefig('uk_letters.png', bbox_inches='tight')